html,body {
    margin: 0;
}
a {
    text-decoration: none;
}
ul {
    list-style: none;
}
.btn {
    display: inline-block;
    padding: .5rem 1.5rem;
    font-size: .9rem;
    border: 1px solid #ff0036;
    border-radius: 5px;
    background-color: #fff;
    color: #ff0036;
}
.btn:hover {
    background-color: #ff0036;
    color: #fff;
    cursor: pointer;
}
.centered {
    text-align: center;
}
.d-inline-block {
    display: inline-block;
}
.shop-header {
    height: 4rem;
    display: flex;
    align-items: center;
    background-color: #f5f5f5;
    padding: 0 2rem;
}
.shop-nav {
    height: 100%;
    display: none;
}
.shop-list {
    display: flex;
    align-items: center;
    margin: 0;
    padding: 0;
}
.shop-list .shop-list-item {
    padding: 0 1rem;
}
.shop-list .shop-list-item a {
    color: #6C6C6C;
}
.shop-list .shop-list-item a:hover,
.shop-list .shop-list-item .active {
    color: #FF4400;
}
main {
    padding: 1.5rem;
}

.mobile-nav {
    width: 15rem;
    height: 100vh;
    max-width: 90%;
    position: fixed;
    top: 0;
    left: 0;
    transform: translateX(-100%);
    transition: transform .3s ease-out;
    z-index: 10;
    background-color: #fff;
}
.mobile-nav.open {
    transform: translateX(0);
}
.mobile-nav-list {
    padding: 2rem 1rem 1rem 2rem;
}
.mobile-nav-item a {
    display: block;
    width: 100%;
    height: 100%;
    font-size: 1.5rem;
    color: #6C6C6C;
    padding: 1rem 0;
}
.mobile-nav-item a:hover,
.mobile-nav-item .active {
    color: #FF4400;
}
.side-menu-toggle.btn {
    background-color: transparent;
    border: 1px solid #999;
    color: #999
}
.side-menu-toggle.btn:hover {
    background-color: transparent;
    border: 1px solid #FF4400;
    color: #FF4400;
}
.mask {
    display: none;
    position: fixed;
    top: 0; 
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, .6);
    z-index: 5;
}
@media (min-width: 768px)  {
    .shop-nav {
        display: flex;
    }
    .side-menu-toggle {
        display: none;
    }
    .mobile-nav {
        display: none;
    }
}